Romero's head is an Easter Egg that looks like the severed head of John Romero impaled on a pole. It appears in Doom II's MAP30: Icon of Sin. MAP30 is Doom II's final map, and the final boss (sometimes known as the Icon of Sin due to the level it appears in) must be damaged with the rocket launcher to finish the level. Players must use the rocket launcher to shoot into a hole in the monster's head; inside of this hole, the target that has to be hit is Romero's head. It is located in a room that cannot be reached or looked into from the outside; the only way to see it is to use the idclip cheat code and go behind the face of the final boss.